Electrical lighting apparatus



May 23, 1967 H. HILZEN ELECTRICAL LIGHTING APPARATUS Filed Feb. 23, 1965INVENTOR, Hy Hilzen,

ATTORNEY.

United States Patent 3,321,615 ELECTRICAL LIGHTING APPARATUS Hy Hilzen,1 Shore View Drive, Yonkers, N.Y. 10710 Filed Feb. 23, 1965, Ser. No.434,543 4 Claims. (Cl. 240-3) ABSTRACT OF THE DISCLOSURE I A tubularcasing having a reduced section terminating in a screw shell means to bereceived in a socket outlet. A reflector of dished form closes thelarger end of the casing and extends therein whereby the mouth of saidreflector is exposed. Diametrically opposite tabs are struck from saidreflector and extend exterior thereof in the direction away from themouth of said reflector. Two dielectric members extend through saidopenings respectively and are mounted on said tabs whereby a portion ofeach of said members is within the reflector and a portion is exteriorthereof. Each of said interior portions present a contact terminalreleasably engaging the end terminals of an elongated electric lamp.Said contact terminals are positioned on resilient conductive elementsextending through said openings along said dielectric membersrespectively; said resilient elements are secured on said exteriorportion of said dielectric members respectively. Conductors within thecasing connect said contact terminals to the terminals of said screwshell means respectively.

The present invention relates to electrical lighting apparatus employingincandescent halogen quartz lamps and more particularly to flood lampand spotlight constructions for use in public buildings, auditoriums,display areas, lawns, arenas, show rooms, lobbies, photography andtelevision studies, art galleries and the like.

An object of this invention is to provide a novel and improved adaptorconstruction, mounting a quartz lamp and including a screw shell to fitinto a screw socket, all associated on a metal casing which is speciallydesigned to dissipate heat.

A further object thereof is to provide a novel and improved constructionwherein the quartz lamp mounting means and a reflector for said lamp areassociated as a unitary structure, fitting as a cap on the mouth of saidcasing which terminates in a screw shell; said unitary structure beinguseable per se in existing spot light devices, and further adaptable tohave various attachments releasably mounted thereon.

A further object thereof is to provide novel and improved illuminatingapparatus of the character described, which is simple in construction,reasonable in cost and eflicient in carrying out the purposes for whichit is designed.

Other objects and advantages will become apparent as this disclosureproceeds.

For one practice of this invention, the adaptor comprises a tubularcasing whose forward portion is of a diameter larger than the length ofthe straight incandescent electric lamp, usually called a quartz lamp,with sufficient space needed for the lamps end mounts. The rearwardportion of said tubular casing is of reduced diameter and terminates ina screw shell for threaded engagement in a screw-in socket to get apower connection to the lam terminals. The wall connecting said tubularportions is bent to have an outer annular channel of appreciable depthand width, surrounding the inner end of said reduced portion of thecasing. This channel wall has a multiplicity of spaced radial slitopenings.

A ferrule fits over the open end of the casing and is released securedthereto. The opening of the ferrule 3,321,615 Patented May 23, 1967 isclosed by an inwardly dished reflector having an outward flange from itsmouth rim; said flange being within said ferrule and secured thereto. Apair of diametrically opposite tabs, struck from the reflector, are bentto lie outside the reflector and extend towards the reduced end of thecasing, thereby leaving an opening at each of them in the reflectorwall, extending from mouth rim to about half the depth of the reflectorbowl. These tabs serve as brackets on which the lamp mounts are fixedrespectively and extend into the reflector through said openingsrespectively, each mount presenting a contact terminal to engage a lampterminal respectively. Various attachments, as for example a vizor, isreleasably mountable on the outer surface of said ferrule, to extendforwardly of the casing. In another instance shown, a ring having alaterally extending slide is carried on the ferrule and thereby adaptsthe adaptor for association with the track means provided in a spotlight casing.

In the accompanying drawing forming part of this specification, similarcharacters of reference indicate corresponding parts in all the views.

FIG. 1 is a perspective View showing a lighting device embodying theteachings of this invention.

FIG. 2 is a central longitudinal section of FIG. 1.

FIG. 3 is a sectional view taken at line 33 in FIG. 2.

FIG. 4 is a perspective view of the reflector member.

FIG. 5 is a fragmentary perspective view showing a vizor attachment onthe item shown in FIG. 1.

FIG. 6 is an exploded partly fragmentary view of the quartz lamp and itsmounting means.

FIG. 7 is a perspective view of a spot light, employing a modifiedconstruction.

FIGS. 2 and 6 are enlarged views.

In the drawing, the numeral 15 designates generally a dished reflectorfor a straight electrical incandescent iodine quartz lamp indicatedgenerally by the numeral 16, whose end socket terminals 17, 17 receivein them the contact buttons 18, 18' respectively, which are presented atthe end of cantilever leaf springs 1?, 19, mounted on the dielectricmounts 20, 20' respectively. The numerals 21, 21' denote insulativestrips covering the exposed surfaces of said leaf springs. The reflector15, has struck therefrom, the diametrically opposite tabs 22, 22, whichare of material commencing from the mouth rim of said reflector. Thesetabs are bent away from the mouth rim, thereby providing the openings23, 23 in the reflector body. Said tabs are respectively in face to facecontact with the legs of a stiif U-shaped frame element 24. The lampmount 20 is secured to the associated tab 22 and frame leg 25, by meansof a screw 26. The lamp mount 20' is secured to the associated tab 22'and frame leg 25. Said lamp mounts are positioned through the openings23, 23' respectively, into the reflector 15, with their contact buttons18, 18' opposite one another.

At the mouth rim of said reflector 15, there is an outward flange 27which is set into and secured to a ferrule member 28. This ferrule is areleasable cap at the forward end of the enlarged section 29 of atubular shell denoted generally by the numeral 30, Whose reduced section31 terminates a screw shell 32 which is insulated from the shell 30 andhas a central contact terminal 33, which is insulated from both shells30 and 32. A conductor 33 connects the blade spring 19 to the screwshell 32, and another conductor 34 connects the blade spring 19' to thecontact terminal 33. It is evident that this construction is of anadaptor to fit into an electrical screwin socket (not shown) to powerthe lamp 16.

The wall 35 which connects the sections 29 and 31, is bent to form arelatively deep and wide annular channel 36, surrounding the reducedtubular section 31, whose outer surface, radially considered is concaveand whose inner surface is convex. The wall of the channel has aplurality of narrow, spaced radial slits 37.

It is important to note that this construction having the slittedsurface 38 which is inwardly convex, efficiently dissipates the heatedair mass within the casing 3!), keep ing it from becoming undulyoverheated. If this inward surface were concave, as was the practice incasing constructions generally, only heated air currents travelingnormal to said surface would escape, while those in other directionswould stay cached within the casing. By having said surface 38 convex,heated air currents travelling in all directions, pass out of thecasing, because they must pass through the convex Wall as soon as theycome to it, because to remain in the casing they need a dome which isonly offered if said inner wall surface 38 is concave. Further, it isthe narrowness of the slits 37 that aids the witdrawal of heated airfrom within the casing, through them, because as some heated air passout of them, such departing air causes a sort of suction action anddraws more heated air with it from within the casing. This suctionaction diminishes if the slits are made wider. So for best coolingaction, the slits 37 are made comparatively narrow. If the slits werealong a circle concentric with the shells axis, the suction action wouldnot occur. The slits must be along lines which are non-concentric withshell axis, for said suction effect to happen.

Various attachments as for instance, a snoot, a twoleaf barn door, acolor filter holder, and as specifically shown, a vizor 39, are wellknown for association with spot lights and flood lamps, and same aremountable on the ferrule cap 28 in the embodiment shown in FIG. 5. Foruse in a spotlight casing structure 40, the attachment onto the ferrulecap 28 may be a ring 41 which has a laterally extending slide 42 inengagement with a track 43, and equipped with an exterior handle 44 formanipulation in manner well known. When the light mount is used in thisset up, the screw shell 32 is omitted, for the leads 33, 34 to the lamp16 are directly connected to the cord or cable 45 which brings currentto the device.

The unit comprising the reflector construction and the lamp mounts 20,is useful for making various fixtures in the illumination field where aplurality of such units are associated by mounting the reflectors attheir flanges to common framework, or by including a ferrule as 28 oneach unit and then mounting such ferrules on common framework, whichembodiments are believed readily understandable by those versed in theart without further illustration herein, and an example of Which isshown in my patent application filed simultaneously herewith, for abounce or indirect lighting apparatus.

This invention is capable of numerous forms and various applicationswithout departing from the essential features herein disclosed. It istherefore intended and desired that the embodiments herein shall bedeemed merely illustrative and not restrictive and that the patent shallcover all patentable novelty herein set forth; reference being had tothe following claims rather than to the specific description andshowings herein to indicate the scope of this invention.

I claim:

1. In an electrical lighting apparatus of the character described, adished reflector having diametrically-opposite tabs struck therefrom,extending exterior thereof in the direction away from the mouth thereofwhereby opposite openings are formed therein, an elongated electric lamphaving aligned contact terminals exposed at its respective ends, twodielectric members extending through said openings respectively andmounted on said tabs respectively whereby a portion of each of saidmembers is within said dished reflector and a portion is exteriorthereof; each of said interior portions presenting a contact terminalreleasably engaging an end terminal of said lamp and positioned onresilient conductive elements extending through said openings along saiddielectric members respectively; said resilient elements being securedto said exterior portions of said dielectric members respectively, asheet metal tubular casing having a reduced section terminating in ascrew shell having a contact element insualted therefrom at its remoteend, to be received in a socket outlet, and conductors within saidcasing connecting said screw shell and its contact element to saidresilient elements respectively; said reflector being mounted in andextending into the larger section of said tubular casing and closing thelarger end thereof whereby the mouth of said reflector is exposed.

2. An electrical lighting apparatus as defined in claim 1, wherein thesections of said tubular casing are connected by a wall; said wall beingbent whereby an exterior annular channel is formed therein surroundingthe inner end portion of said reduced section; said channel facing awayfrom the larger section of said casing and having a plurality of slitsalong lines non-concentric with the axis of the casing.

3. An electrical lighting apparatu as defined in claim 2, wherein thewall of said channel interior of the casing is convex.

4. An electrical lighting apparatus as defined in claim 2, including aferrule cap releasably mounted on the month end of the larger section ofsaid casing; said reflector having an outward flange extending from itsmouth rim; said flange being within said ferrule and secured thereto.

References Cited by the Examiner FOREIGN PATENTS 3/1909 Great Britain.9/1936 Great Britain.

1. IN AN ELECTRICAL LIGHTING APPARATUS OF THE CHARACTER DESCRIBED, ADISHED REFLECTOR HAVING DIAMETERICALLY-OPPOSITE TABS STRUCK THEREFROM,EXTENDING EXTERIOR THEREOF IN THE DIRECTION AWAY FROM THE MOUTH THEREOFWHEREBY OPPOSITE OPENINGS ARE FORMED THEREIN, AN ELONGATED ELECTRIC LAMPHAVING ALIGNED CONTACT TERMINALS EXPOSED AT ITS RESPECTIVE ENDS, TWODIELECTRIC MEMBERS EXTENDING THROUGH SAID OPENINGS RESPECTIVELY ANDMOUNTED ON SAID TABS RESPECTIVELY WHEREBY A PORTION OF EACH OF SAIDMEMBERS IS WITHIN SAID DISHED REFLECTOR AND A PORTION IS EXTERIORTHEREOF; EACH OF SAID INTERIOR PORTIONS PRESENTING A CONTACT TERMINALRELEASABLY ENGAGING AN END TERMINAL OF SAID LAMP AND POSITIONED ONRESILIENT CONDUCTIVE ELEMENTS EXTENDING THROUGH SAID OPENINGS ALONG SAIDDIELECTRIC MEMBERS RESPECTIVELY; SAID RESILIENT ELEMENTS BEING SECUREDTO SAID EXTERIOR PORTIONS OF SAID DIELECTRIC MEMBERS RESPECTIVELY, ASHEET METAL TUBULAR CASING HAVING A REDUCED SECTION TERMINATING IN ASCREW SHELL HAVING A CONTACT ELEMENT INSUALTED THEREFROM AT ITS REMOTEEND TO BE RECEIVED IN A SOCKET OUTLET, AND CONDUCTORS WITHIN SAID CASINGCONNECTING SAID SCREW SHELL AND ITS CONTACT ELEMENT TO SAID RESILIENTELEMENTS RESPECTIVELY; SAID REFLECTOR BEING MOUNTED IN AND EXTENDINGINTO THE LARGER SECTION OF SAID TUBULAR CASING AND CLOSING THE LARGEREND THEREOF WHEREBY THE MOUTH OF SAID REFLECTOR IS EXPOSED.